Improvement in watch-chain guards or keys



UNITED STATES.

PATENT OFFICE. i

CARL E. GREEN, OF GOPENHAGEN, DENMARK, ASSIGNOR TO THORWALD F. HAMMER, OF BOSTON, MASSACHUSETTS.

IMPROVEMENT lN WATCH-CHAIN GUARDS OR KEYS.

Specification forming part of Letters No. 36,754, dated October :21,

T0 all whom it may concern:

Be it known that I, CARL E. GREEN, a subject of the Kingv of Denmark, and a resident of Gopenhagemthe capital thereof. have invented a new and useful or Improved Watch- Chain Guard or Key; and I do hereby declare the same to be fully described in the following specification and represented in the accompanying drawings, of which- Figure 1 is a side View, and Fig. 2 a longitudinal section, of it as it appears when distended. Fig. 3 is a side view, and Fig. 4 a longitudinal section,of it when it is contracted. Fig. 5 is another longitudinal section of it, the plane of this latter section being taken at right angles with that of Fig. 2.

The common watch-'chain guard and key for winding a watch have been constructed and combined in such manner as not only to constitute a part of the guard or case for the 'key-pipe, but to allow such case to beso moved or slid longitudinally on the said key or key# pipe as to cause the latter to project beyond the end of the formerfar enough forinsertion in the key-hole of a watch for the purpose of winding the watch.

In order to prevent dirt or extraneous matter from getting into or accumulating Within the bore of the pipe of the key, I have combined therewithand the key-head and socket i tube a plunger or clearer, which, when the key-pipe is entirely within its socket-tube, will so close the mouth of the key as to prevent any dirt or matter from so getting therein as to be an obstruction to the proper fitting of the key on the receiving-head of the winding-arbor of a watch. While the socket-tube is being pressed back into the key head or slide, and so as to expose the key or cause its pipe to project from the end of the sockettube, the clearer will be retracted within the key-pipe, and thus the latter will be free to receive the head of the winding-arbor of a watch.

In the drawings, A represents the sockettube; B, the slider orhead,and O the key-pipe.

The socket-tube A at one end is provided withan ornamental head, while at its other end it is extended into a slider,'B, whose external form vclosely resembles that of the head h.

sented as arranged concentrically 'withinv the chamber of the slider B, and attached to the bottom thereof. A long slot, b, is made laterally through the tube C* for some distance above its bottom, and receives a cross-bar, c, tothe middle of which one end of a prismatic rod or clearer, a, is fastened. The cross-bar c is attached to the sockettube A, while the clearer a is arranged within the key-tube C, as shown in the drawings, the two being so adapted to one another as to have ythe bore of the tube closely lttedto the clearer.

A suspensionriug, d, may be applied to the tube A in any proper manner', for the purpose of enabling the combined watch key and guard to be attached to a watch-chain.

I claimf The combination of the clearer a, the key C, the slider B, and the socket-tube A, the whole being arranged substantially in manner'and so as to operate as described.

CARL E. GREEN.

Witnesses:

,0. F. SHoRNsTEDT,

VIGGO O. P. HAMMER. 

